Freeciv is a free turn-based multiplayer strategy game, in which each player becomes the leader of a civilization, fighting to obtain the ultimate goal: to become (or subvert) the greatest civilization.

A cross-platform application for exploring Conway's Game of Life and other cellular automata. Features include bounded and unbounded universes, fast generating algorithms, Perl/Python scripting, and a state-of-the-art pattern collection.

Metamod-P is enhanced version of Metamod. It has dynamic link-entities and automatic detection of Mod DLL and other improvement to allow it work with future Half-Life Engine updates and new Mods and updates. It also has performance optimizations.

Scrabble3D is a highly customizable Scrabble game that not only supports Classic Scrabble and Superscrabble but also 3D games and own boards. You can play local against the computer or connect to a game server to find other players.

This is the full sourcecode, all graphics, music, soundfx, and assets related to the game. Binaries are available in the downloads, however, it is advised that you run all execution from MS Studio debugger so that no chance of dataloss can exist.
2012: Visit http://www.afterprotocol.com/ to play the open-source version of the game!
Visit http://www.beyondprotocol.org/ for the community forums.
Visit https://sourceforge.net/apps/mediawiki/beyondprotocol/index.php?title=Main_Page for the Wiki.

Wiremod is an add-on, written in Lua, for the game Garry's Mod.
It allows users to wire up components in order to make more elaborate automatic and user-controlled contraptions.
It also comes with several scripting languages.

An OpenGL implementation of the popular TV game show Who Wants to be a Millionaire. Questions and fastest finger round are easily customizable, along with a recreation of the graphics and sounds from the show.

AMX Mod X is a Metamod plugin which allows you to write modifications for Half-Life with Small scripting language. It provides in-game administration tools, game statistics, server management and gameplay modificators. It is based on the original AMX Mod